Wrench



G. PESZTERNAK WRENCH.

APPLICATIONTILED MAY 11. 1921.

1,398,274, Patented Nov. 29, 1921.

I N VEN TOR.

PESZTER NAK A TTORNE Y GUSTAV PESZTERNAK, 0F

TRENTDN, NEW JERSEY.

. wnnncn.

' Application filed May 11,

To all whom it may concern.

Be it known that I, G-us'rnv Pnszrnnnnn, citizen of Hungary, residing at Trenton, in the county of Mercer and State of New Jersey, have invented certain new anduseful Improvements in "Wrenches, of which the following is a specification.

This invention relates to wrenches of the type in which the movable jaw is adjusted by a nut having a threaded engagement with the shank of the wrench and it has for an object to provide a novel and simple arrangement whereby the movable jaw may be rapidly adjusted when being moved over considerable distances.

A further object relates to the provision of means for releasably retaining the nut for the-movable jaw in threaded engagement with the shank.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying draws ings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Figure 1 of the drawings is a side view, partly in longitudinal section, of a wrench constructed according to the invention.

Fig. 2 is an edge view, partly in longitudinal section.

Fig. 8 is a horizontal section on the line 33 of Fig. 1.

Fig. 1 is a horizontal section on the line k el of Fig. 2. v

Fig. 5 is a horizontal section on the line 5-5 of Fig. 1.

As here shown myj improved wrench comprises a shank 1O flattened on opposite sides as at 10 and presenting arcuate screw threaded parts 10*. Upon one end of the shank is a fixed jaw element 11 having a flat jaw 11 and a toothed curved jaw 11 extending on opposite sides of the shank.

At its opposite end the shank is diminished in size as at 10 and passes through a hollow handle 12 and is screwed into a nut 13 fixed in the outer end of the handle. A bushing 14 is fixed in the inner end of the handle 12 and is keyed as at 15 to the shank 10.

Loosely encircling the shank extension; 10 in the handle 12 is a collar 16 to opposite sides of which are fixed the rear ends of a pair of flat bars 17 which extend outwardly through suitable recesses in the bushing 14 Specification of Letters Patent. Patented Nrpw, 29, 1921,.

1921.. Serial no.4eac51.

and have a disk 18 fixed on their outer ends, this disk 18 fitting slidably on the shank 10 and having serrations 19 on its outer face.

A coiled expansion spring 20 bears between.

the nut 13 and the collar 16 and acts to press the disk 18 toward the jaw element 11.

. Upon theshank 10 is slidab'le a jaw ele ment having opposed jaws 23 and 23 complementary to the fixed jaws 11 and 11. Upon the inner end of the jaw element 23 is a hooked finger 24tengaging freely in a peripheral groove 25 in a nut 26 on the shank 10, thereby providing a swivel engagement betweenthe nut 26 and jaw 23. The nut 26 is provided with arcuate screw threads 26 which present a space between the ends-thereof as great as the thickness of the flattened shank 10 so that by par tially turning the nut its threads may be.

freed from the threads on the shank. The disk 18, above mentioned, bears against the rear face of this nut 26 which is serrated in correspondence to the serrations 19 on the disk, the engagement of these serrated faces acting to yieldingly hold the nut against rotation, as will be apparent.

It is believed that the manner of adjustment of the movable jawelement 23 will be readily understood from the above description. If it is desired to adjust the jaw 23 the nut 26 is turned until the threads 23 thereof are free of the threads 10 on the shank, the serrated faces on the nut 26 and the disk 18 riding over one another, as will be apparent. lVhen the nut 26 is freed, the jaw 23 may then be moved against the pressure of spring 20, if the jaws 'are to be opened more widely, or allowed to move to ward the fixed jaw 11, as desired. The nut 26 is then given a partial turn to reengage the screw threads, being held against disengagement by the engagement of the serrated face thereon with the disk 18 under the pressure of spring 20.

Having thus described my invention what i claim as new and desire to protect by Letters Patent of the United States is as follows 1. A wrench comprising a shank presenting arcuate screw threads, 21- j aw slidable thereon, a nut on said shank having a swivel engagement with said jaw, said nut having arcuate threads adapted to engage with and disengage from the screw threads on the shank by partial rotation of the'nut, said nut having serrations formed on its rear face, and

a spring-pressed disk slidalole and non-rota table on said shank having on its front face serrations similar to and adapted to engage the serrations on the nut.

2. A wrench comprising a shank present ing arcuate screw threads, a fixed jaw on said shank, a jaw slidable on said shank, a nut on said shank having a swivel. engagement with said jaw, said nut" having arcuate screw threads adapted to engage with and disengage from the screw threads on the shank by partial rotation of the nut, an element slidahle and non-rotatable on said shank, said element and nut having inclined engaging faces adapted to cause longitudinal movement of said element upon ro tation of said nut, and a spring pressing said element against said nut, for the purpose specified. V

3. A wrench comprising a flattened shank presenting arcuate screw threads, a fixed jaw on said shank, a'jaw slidable on said shank, a nut on said shank having a swivel engagement with said jaw, said nut having arcuate screw threads adapted to engage with and disengage from the screw threads on the shank by partial rotation of the nut, a hollow handle fixedto said shank, a coiled expansion spring in said handle, a collar slidable on the shank in said handle and pressed toward the said nut by said spring, and means connected to said collar adapted to hold the nut yieldingly against rotation 4. A wrench comprising a flattened shank presenting arcuate screw threads, a fixed jaw on said shank, a jaw slidalole on said shank,

a nut on said shank having a swivel engage said means includinga pair of bars fixed to.

said collar and extending outwardly from the handle on opposite sides of the shank, a disk mounted on the ends of said bars, said disk having 'aserrated face engaging a complementary face on the said nut.

In testimony whereofl have affixed my signature.

GUSTAV rnszTEnNAK. 

